dsh-maestro-mobile: Mobile Adaptation for the DeepSeek Harness Web UI

`dsh-maestro-mobile` is a mobile-device adaptation plugin for DeepSeek Harness. When a touch-enabled device with a screen width below 1024px is detected, the plugin converts the sidebar into a drawer, changes dialogs into bottom sheets, and optimizes safe-area handling and layout to prevent element compression. It supports tablet compatibility, notch-screen adaptation, and diagnostic mode. Installation is performed via a DSH plugin command and requires Node.js ≥ 22, pnpm ≥ 11, and Chromium 105+. By default, the plugin is active only in mobile touch mode and acts as a no-op on desktop.